International transistor equivalents guide bernard babani. A transistor is a semiconductor device used to amplify or switch electronic signals and electrical. Bc546 bc547 bc548 bc549 bc550 npn epitaxial silicon transistor keywords. Bc549c npn transistor complementary pnp, replacement. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit. The bc548 and bc549 are almost identical npn transistors. Problem is, i cant find a bc148 transistor and im looking for a substitute. Choosing transistor replacements electronics notes.
Bc549c is an npn transistor in a small plastic case. Bc547, bc547 datasheet, bc547 npn general purpose transistor datasheet, buy bc547 transistor. These were made by etching depressions into an ntype germanium base from both sides with jets of indiumiii sulfate until it was a few tenthousandths of an inch thick. Both transistors have a maximum collectoremitter rating of 30 v, and collectorbase rating of 30 v. Texas instruments transistor and diode databook 1st ed 1973 datasheets for diodes from 1n251 on and transistors from 2n117 on acrobat 7 pdf 34. Matching transistor pairs are available with 5% and 10% matching on hfe or hfe. They both have an absolute maximum collector rating of 100 ma, and power dissipation of 500 mw. Substitute to bc148 transistor electronics forum circuits.
Emitter npn epitaxial silicon transistor absolute maximum ratings ta25c unless otherwise noted symbol parameter value units vcbo collectorbase voltage. I am kinda new to this circuit making stuff, and i took a introductory subject to electrical engineering. Bc549c datasheet, equivalent, cross reference search. Transistor equivalent bipolar junction transistor transistor scribd. A voltage or current applied to one pair of the transistors terminals controls the current through another pair of terminals. Transistor equivalent or substitute used for power amplifier. But 8050 and 8550 seem by fit to make pushpull amplifer.
Low noise input stages, hifi amplifiers, signal processing circuits of television receivers. The bc549 transistor might have a current gain anywhere between 110 and 800. Bc549c transistor the bc549c is an npn transistor belonging to a group of generalpurpose npn semiconductors consisting of bc547, bc548, and bc549. Bc549c datasheet14 pages motorola low noise transistors. The gain of the bc549 will be in the range from 110 to 800, bc549a ranges from 110 to 220, bc549b ranges from 200 to 450, bc549cg ranges from 420 to 800. Applications low noise stages in audio frequency equipment. Bc549c transistor datasheet pdf, bc549c equivalent. Discrete semiconductors data sheet book, halfpage m3d186 bc549. Mar 11, 2008 its an npn transistor rated for 500ma, 50v and with a hfe gain between 20 and 300, typically 80 at 0. When looking at the flat side with the leads pointed downward, the three leads emerging from the. Aug 25, 2011 crossreferences are not magic, understanding of the circuit and a parametric search of the important parameters is much more reliable. You mentioned that you need 1a peak and 800ma continuous. If its just switching, then its much less important to get an exact equivalent and even something like a bc337 would probably do. Transistor academic dictionaries and encyclopedias.
The bc548 is a generalpurpose npn bipolar junction transistor commonly used in european and american electronic equipment. Free tools for electronics designers, eagle libraries. Bc550 npn general purpose transistors 1999 apr 22 product specification supersedes data of 1997 jun 20 philips semiconductors product specification npn general purpose transistors bc549. A voltage or current applied to one pair of the transistor s terminals controls the current through another pair of terminals. Bc549 has very low continuous current of 100ma hence it cannot be used to switch heavy loads. Transistor amplifier circuits here is a very simple bc549c transistor amplifier circuit using an lt700 transformer to drive a loudspeaker. It is notably often the first type of bipolar transistor hobbyists encounter and is often featured in designs in hobby electronics magazines where a generalpurpose transistor is required. Bc5xyc device code x 4 or 5 y 9 or 0 a assembly location y year ww work week pb. General purpose transistors, best suited for use in driver stages of audio amplifiers, of tape recorders. Bf199, bf494, 2n4001, 2n4003, mpsa18 and there are all i have.
So called equivalent parts, or nte replacements, may not work at all in some cases, because they were worse in some spec, or the circuit was designed with the assumptions that the part had a fairly low bandwidth. A transistor is a semiconductor device used to amplify or switchelectronic signals and electrical power. Pnp transistors tend to have a lower early voltage than their npn. Bc549c transistor bc550cg bc549c transistor bc549c bc549cg bc550c transistor transistor yc 520. Url 2,9 v uled 1,6 v uce 0 v t conducts ideal ic url rl 270. This is a pdf format of the well known hardware pinout book, which covers various computer, electrical and electronic item pinouts. If the base current needs to be 20ma, lets say, then you know that the resistor is 4.
The first highfrequency transistor was the surfacebarrier germanium transistor developed by philco in 1953, capable of operating up to 60 mhz. Semiconductor transistor, diode, ic cross reference. Bc549c datasheet pdf bcc transistor datasheet pdf, bcc equivalent. It is notably often the first type of bipolar transistor hobbyists encounter and is often featured in designs in hobby electronics magazines where. Bc549c transistors datasheet pdf purpose transistors. Everyday low prices and free delivery on eligible orders. Type number package name description version bc549c sc43a plastic singleended leaded through hole package. Feb 09, 2019 list of equivalent part of transistors jfet fet diodes. Bc549 npn transistor complementary pnp, replacement. Ive built a deluxe dynacomp, using parts avalible nowdays, the transistors i used were all bc549c with an average gain of about 640, the bc549c is a lownoise npn silicon bipolar transistor, equivalent to a bc109c, according to my transistor data books, they seem to work fine. These were made by etching depressions into an ntype germanium base from both sides with jets of indiumiii sulfate. This is the typical ac resistance equivalent to ra seen looking into the. In 1934, german inventor oskar heil patented a similar device in europe. Can you guys help me find out the transistors that can.
And the gain grades a,b,c line up too so its really the bc549c you want to replace the 109c gain about 400 or higher bc107 was aimed at switching, bc109 was aimed at low noise amplification, and the distinction lives on in the bc54x series and their bc84x surface mount replacements. Transistor equivalent electronics forum circuits, projects. The tables will assist in the selection of the proper transistor for a. Smallsignal transistor data book, 86 pages, 1984, motorola. Bc549 datasheet, equivalent, cross reference search. I am searching something can replace these transistors. Ic cross reference cross reference ci stk cross reference ci tda cross reference ci sharp cross reference hitachi audio ic cross reference and circuit applications smd cross reference and equivalent we make every effort to ensure that the material on this site is accurate, however we do not warrant or represent that the information is free. The most noticeable difference is in the packaging and.
The bc549c transistor might have a current gain anywhere between 420 and 800. Apr 01, 2009 after comparing the spec sheets online and doing a little bit of googling, i found that pnp transistor 2n3906s characteristics and specs seem to fit pretty well with bc559 and bc548 fits fairly well with 2n3904s. Bc546, bc547, bc548, bc549, bc550, npn epitaxial silicon transistor created date. Buy international transistor equivalents guide bernard babani publishing radio and electronics books by michaels, adrian isbn. Motorola small signal transistor data book 1984 search electronics.
It is housed in a to92 package for medium power applications. Bc549c npn transistor complementary pnp, replacement, pinout. If you are using the little whippersnappers crystal radio system and need a simple circuit to drive the loudspeaker, then this will work. I have a small circuit which controls the speed of a dc motor as per the ambient temperature. These transistors are utilised in audio frequency, and small signal directly coupled preamplifiers. The bc548 is a generalpurpose npn bipolar junction transistor commonly used in european. Transistor packages are mainly standardized, but the assignment of a transistors functions to the terminals is not. This npn bipolar transistor is designed for high gain, low noise general purpose amplifier applications. As discussed a transistor will act as an open switch during forward bias and as a closed switch during reverse bias, this biasing can be achieved by supplying the required amount of current to the base pin. Bc557 transistor as switch when a transistor is used as a switch it is operated in the saturation and cutoff region as explained above. These transistors are the direct modern equivalent replacements to the earlier bc107, bc108, and bc109. If in doubt, download the transistors datasheet from the internet all the.
The bc141 is also a general purpose npn transistor in a metal package with a higher voltage rating probably unnecessary in your application and higher current rating. The gain of the bc549a will be in the range from 110 to 220, bc549b ranges from 200 to 450, bc549c ranges from 420 to 800, bc549cg ranges from 420 to 800. Aug 27, 2010 the bc108 is a low power general purpose npn transistor in a metal package. More than 490,000 part numbers, type numbers, and other identifying numbers listed. Even for the same transistor type the terminal assignment can vary normally indicated by a suffix letter to the part number, q. Switching time equivalent test circuits scope rise time npn epitaxial silicon transistor author. Cross reference universal transistor reference page 1.
Inexpensive plastic packaged pn 2222a, 2n3904, 2n4401, or 2sc945 should all be acceptable substitutes. Unit vcbo collectorbase voltage open emitter bc549. This is the typical ac resistance equivalent to ra seen looking into. A complete guide to semiconductor replacement and substitutions from the makers of photofactr service documentation. Master electronics repair list of equivalent part of.
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